THOUSAND OAKS, Calif. and SOUTH SAN FRANCISCO, Calif., Sept. 18, 2013 /PRNewswire/ -- Amgen (NASDAQ:AMGN) and Onyx Pharmaceuticals, Inc. (NASDAQ:ONXX) today announced that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (HSR), in connection with Amgen's proposed acquisition of Onyx, was terminated early on Sept. 18, 2013, by the United States Federal Trade Commission. The waiting period was scheduled to expire on Sept. 23, 2013. (Logo: http://photos.prnewswire.com/prnh/20081015/AMGENLOGO) (Logo: http://photos.prnewswire.com/prnh/20130825/LA69117LOGO) As previously announced on Aug. 25, 2013, Amgen and Onyx entered into an agreement under which Amgen will acquire all of the outstanding shares of Onyx for $125 per share in cash, with the transaction to be effected through a tender offer. The termination of the HSR waiting period satisfies one of the conditions to consummate the tender offer. Other closing conditions remain to be satisfied, including, among others, a minimum tender of at least a majority of outstanding Onyx shares on a fully diluted basis. The tender offer is scheduled to expire at 12:00 midnight, New York City time, on Oct. 1, 2013 (one minute after 11:59 p.m., New York City time, on Sept. 30, 2013), unless it is extended pursuant to and in accordance with the terms of the merger agreement between Amgen and Onyx. The complete Offer to Purchase dated Sept. 3, 2013, related to the tender offer has been filed with the U.S. Securities and Exchange Commission and can be viewed online at www.sec.gov. About AmgenAmgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology. Amgen focuses on areas of high unmet medical need and leverages its biologics manufacturing expertise to strive for solutions that improve health outcomes and dramatically improve people's lives. A biotechnology pioneer since 1980, Amgen has grown to be the world's largest independent biotechnology company, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential.